amr_reorder.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:5k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hlxclib/string.h"
- #include "amr_reorder.h"
- #include "hxassert.h"
- #include "amr_frame_info.h"
- #include "./reorder.tab"
- const UINT16* const CAMRBitReorder::zm_pToCodecTbl[2][8] = {
- {z_pNBMode0DecTbl, // AMR-NB
- z_pNBMode1DecTbl,
- z_pNBMode2DecTbl,
- z_pNBMode3DecTbl,
- z_pNBMode4DecTbl,
- z_pNBMode5DecTbl,
- z_pNBMode6DecTbl,
- z_pNBMode7DecTbl},
- {0, 0, 0, 0, 0, 0, 0, 0} // AMR-WB
- };
- CAMRBitReorder::CAMRBitReorder(AMRFlavor flavor) :
- m_pWorkspace(0),
- m_flavor(flavor)
- {
- ULONG32 workspaceBytes = (CAMRFrameInfo::MaxFrameBits(m_flavor) + 7) >> 3;
- m_pWorkspace = new UINT8[workspaceBytes];
- for (ULONG32 i = 0; i < 2; i++)
- for (ULONG32 j = 0; j < 8; j++)
- m_pToNetworkTbl[i][j] = 0;
- }
- CAMRBitReorder::~CAMRBitReorder()
- {
- // Remove ToNetwork entries if they were created
- for (ULONG32 i = 0; i < 2; i++)
- {
- for (ULONG32 j = 0; j < 8; j++)
- {
- delete [] m_pToNetworkTbl[i][j];
- m_pToNetworkTbl[i][j] = 0;
- }
- }
- delete [] m_pWorkspace;
- m_pWorkspace = 0;
- }
- void CAMRBitReorder::ToCodec(ULONG32 frameType, UINT8* pInOut)
- {
- HX_ASSERT(frameType < 8);
- HX_ASSERT(zm_pToCodecTbl[frameType]);
- ReorderBits(CAMRFrameInfo::FrameBits(m_flavor, frameType),
- zm_pToCodecTbl[m_flavor][frameType],
- pInOut);
- }
- void CAMRBitReorder::ToNetwork(ULONG32 frameType, UINT8* pInOut)
- {
- HX_ASSERT(frameType < 8);
-
- if (!m_pToNetworkTbl[frameType])
- GenerateTable(frameType);
- ReorderBits(CAMRFrameInfo::FrameBits(m_flavor, frameType),
- m_pToNetworkTbl[m_flavor][frameType],
- pInOut);
- }
- void CAMRBitReorder::ReorderBits(ULONG32 bitCount, const UINT16* pTbl,
- UINT8* pInOut)
- {
- ULONG32 byteCount = (bitCount + 7) >> 3;
- const UINT8* pIn = pInOut;
- while (bitCount)
- {
- UINT8 ch = *pIn++;
- ULONG32 i = 8;
- while (bitCount && i)
- {
- ULONG32 outBit = *pTbl++;
- ULONG32 outByte = outBit >> 3;
-
- ULONG32 outCh = 1 << (7 - (outBit & 0x7));
- if (ch & 0x80)
- m_pWorkspace[outByte] |= outCh;
- else
- m_pWorkspace[outByte] &= ~outCh;
- ch <<= 1;
- i--;
- bitCount--;
- }
- }
- ::memcpy(pInOut, m_pWorkspace, byteCount); /* Flawfinder: ignore */
- }
- // Generate the "to network" table which is the inverse of the
- // "to codec" table.
- void CAMRBitReorder::GenerateTable(ULONG32 frameType)
- {
- HX_ASSERT(zm_pToCodecTbl[frameType]);
- HX_ASSERT(!m_pToNetworkTbl[frameType]);
- ULONG32 bitCount = CAMRFrameInfo::FrameBits(m_flavor, frameType);
-
- const UINT16* pSrcTbl = zm_pToCodecTbl[m_flavor][frameType];
- UINT16* pDestTbl = new UINT16[bitCount];
- for (ULONG32 i = 0; i < bitCount; i++)
- pDestTbl[pSrcTbl[i]] = (UINT16)i;
- m_pToNetworkTbl[m_flavor][frameType] = pDestTbl;
- }